A margarita pictured here would contain well over 1,000 calories. My guess is more like 1500, but it's hard to say. The reason is mostly the mix that you use with tequila to make a margarita. I enjoy an occasional margarita, but let's face it. There's a ton of calories and we are all in the battle of the bulge.
I quickly googled on my iPhone for the fewest calorie margarita mix while I was at the grocery store. To my surprise, I found a bunch of home made recipes that boasted only 100 or so calories a glass.